CN102013866A - Static exciter of an electric generator, method for retrofitting and method for operating the same - Google Patents
Static exciter of an electric generator, method for retrofitting and method for operating the same Download PDFInfo
- Publication number
- CN102013866A CN102013866A CN201010286458XA CN201010286458A CN102013866A CN 102013866 A CN102013866 A CN 102013866A CN 201010286458X A CN201010286458X A CN 201010286458XA CN 201010286458 A CN201010286458 A CN 201010286458A CN 102013866 A CN102013866 A CN 102013866A
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- China
- Prior art keywords
- static exciter
- field circuit
- capacitor group
- connecting line
- electrical network
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/14—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field
- H02P9/26—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field using discharge tubes or semiconductor devices
- H02P9/30—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field using discharge tubes or semiconductor devices using semiconductor devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/10—Control effected upon generator excitation circuit to reduce harmful effects of overloads or transients, e.g. sudden application of load, sudden removal of load, sudden change of load
- H02P9/105—Control effected upon generator excitation circuit to reduce harmful effects of overloads or transients, e.g. sudden application of load, sudden removal of load, sudden change of load for increasing the stability
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/14—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field
- H02P9/26—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field using discharge tubes or semiconductor devices
- H02P9/30—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field using discharge tubes or semiconductor devices using semiconductor devices
- H02P9/305—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field using discharge tubes or semiconductor devices using semiconductor devices controlling voltage
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
The static exciter (1) of an electric generator (2) comprises a main transformer (8) having its high voltage side connected to the grid (5) and its low voltage side connected to a field circuit converter (9) that feeds a generator field circuit (3). The static exciter (1) further comprises a control unit (11) arranged to detect the status of the grid (5) to cause at least a capacitor bank (13) to supply energy to said generator field circuit (3) in case the voltage of the grid (5) falls below a prefixed voltage value. The capacitor bank (13) is connected between the low voltage side of the main transformer (8) and the AC side of the field circuit converter (9). The invention also refers to a method for retrofitting a method for operating a static exciter (1).
Description
Technical field
The present invention relates to static exciter (static exciter), modified method and the method for operation thereof of generator.
Background technology
Synchronous generator comprises stator that has armature circuit usually and the rotor that comprises field circuit (filed circuit) usually.
During operation, when rotor rotation, the excitation field circuit makes because of variations of flux rate induced potential in armature circuit.
For the excitation field circuit, the high-voltage side with transformer is connected to electrical network (or busbar) usually, and its low voltage side is connected to the AC/DC transducer.
This AC/DC transducer handle becomes dc voltage from the AC voltage commutation that transformer provided, and provides it to the field circuit of generator.
Because for the electric power of field circuit feed directly provides from electrical network, electrical network break down or the situation of disturbance under the voltage of electrical network is temporarily descended, so the stability of generator/network system can suffer damage, make electrical network and generator can lose that it is synchronous.
Electrical network often provides automatic safe and protection system, and they are intervened to recover specified line voltage when this class fault takes place; Yet the time that its common cost reaches the several seconds is recovered line voltage, thereby can't guarantee the stability of generator/network system when fault takes place.
US2007/0296275 discloses provides a kind of safety circuit, and it is configured under the situation that electrical network breaks down electric power be injected field circuit, so that guarantee the stability of generator/network system, thereby prevents that them from losing that it is synchronous.
This safety circuit comprises capacitor group, the switch that starts and directly inserts field circuit under the situation of electric network fault diode (that is, this diode must be positioned on the rotor).
Under the situation that electrical network breaks down, starting switch makes the capacitor group that its energy is offered in the field circuit.
Yet, even this technology proves very effective, but its be implemented under the certain situation may be very difficult, cost is high and time-consuming, because its requires diode is positioned on the rotor.
Specifically, the remodeling of existing generator is difficult, because must open generator housing and diode must be installed on the rotor.
During this operation special charges and the cost height.
Summary of the invention
Therefore, technical goal of the present invention provides the method for static exciter, modified method and operation static exciter, has eliminated the described problem of known technology by them.
Within the scope of this technical goal, one aspect of the present invention provides static exciter and method of operation thereof, and its realization is simple and easy, saving cost and time saving.
Another object of the present invention provides a kind of modified method, and its realization can be simple and easy, saving cost and time saving.
According to the present invention,, realize that this technical goal is together with these and other aspect by the method for static exciter, modified method and operation static exciter according to appended claims is provided.
Description of drawings
As the description to the preferred but non-exclusive embodiment of static exciter according to the present invention and method shown in the non-limiting example, other characteristic of the present invention and advantage will become more obvious by in the accompanying drawings, and accompanying drawing comprises:
Fig. 1 is the schematic diagram of the static exciter of the first embodiment of the present invention;
Fig. 2 is the details of second embodiment of static exciter of the present invention;
Fig. 3 is the 3rd embodiment of static exciter of the present invention; And
Fig. 4 is the details of Fig. 3.
Embodiment
With reference to accompanying drawing, the static exciter 1 of generator 2 is shown.
The busbar 4 (stator three-phase circuit) that generator 2 has field circuit 3 and is connected to electrical network 5 via transformer 6.
9 conversions of field circuit transducer are from the AC voltage of main transformer 8, and the employing dc voltage is to generator field circuit 3 feeds.
Advantageously, static exciter also comprises at least one coupling circuit 15, and it is connected to capacitor group 13 connecting line 16 between the AC side of the low voltage side of main transformer 8 and field circuit transducer 9.
Describe different embodiments of the invention below in detail.
In first embodiment of static exciter (Fig. 1), coupling circuit 15 comprises auxiliary three phase converer 17, and its DC side is connected to capacitor group 13, and the AC side is coupled to connecting line 16.
Preferably, auxiliary converter 17 is bidirectional transducers, feasible charging and the discharge that allows capacitor group 13.
For example, auxiliary converter 17 is made by power semiconductor bridge (IGBT, thyristor); Under any circumstance, these transducers are well-known in the art, and any suitable transducer or power semiconductor are disposed and be can be used for realizing the present invention.
The AC side inductance type of auxiliary converter 17 is coupled to connecting line 16, and aspect this, inductance coupling high realizes via auxiliary transformer 18.
In this embodiment of the present invention, control unit 11 is connected at least two auxiliary connecting lines 19.Certainly can provide the connection of also arriving whole three auxiliary connecting lines 19, and under the situation of difference configuration (for example greater or less than three-phase), can provide greater or less than two connections.
In addition, control unit 11 is connected to auxiliary converter 17 so that it is driven.
Specifically, control unit 11 drives auxiliary converter 17, makes it make 13 discharges of capacitor group or charging.
The operation of the static exciter of this embodiment by described and shown in be conspicuous, and as described below in fact.
During normal running (wherein the voltage net is at its nominal value), control unit 11 drives auxiliary converter 17, makes it make electric power be delivered to capacitor group 13 from auxiliary transformer 18 through it.
In this case,, make that it is recharged all the time under failure condition to capacitor group 13 charging, and immediately with its energy discharge in field circuit 3.
When electrical network 5 broke down, line voltage descended, thereby Bus Voltage also descends, and the voltage of the low voltage side of main transformer 8 descends; This voltage that causes auxiliary connecting line 19 again descends.
The voltage that detects auxiliary connecting line 19 when control unit 11 has dropped to when being lower than scheduled voltage, and it drives auxiliary converter 17, makes its allow electric power to pass through it and be delivered to auxiliary transformer 18 from capacitor group 13.
This causes that capacitor group 13 is discharged, and by auxiliary converter 17 and auxiliary transformer 18 its energy is offered connecting line 16, thereby offers field circuit 3 by field circuit transducer 9.
Known in the art, when electrical network 5 broke down, a plurality of automatic protections and control system were intervened, so that recover line voltage; The recovery of line voltage was carried out in the kind at several seconds usually.
Therefore, in case recovered line voltage (thereby also having recovered auxiliary connecting line voltage), then control unit 11 drives auxiliary converter 17, makes it make electric power be delivered to capacitor group 13 from auxiliary transformer 18 through it once more.
Therefore, capacitor group 13 is charged to ready state, so that under the situation of other electric network fault, intervene.
Fig. 2 illustrates second embodiment of static exciter of the present invention.Among Fig. 2, has identical reference number with the element that the described element of reference first embodiment is similar or equal.
The static exciter of second embodiment has structure and the feature identical with first embodiment.
In addition, this static exciter has three capacitor groups 13 that respectively are connected to auxiliary single phase converter 17, wherein auxiliary single phase converter 17 is connected to auxiliary transformer 18, and auxiliary transformer 18 is coupled to the connecting line 16 between main transformer 8 and the field circuit transducer 9; In addition, provide the control unit 11 of each auxiliary converter 17, the single control unit 11 (this embodiment as shown in Figure 4) of each auxiliary converter 17 of independent control perhaps alternatively is provided.
In other words, static exciter has an electric power injection circuit (each electric power injection circuit comprises capacitor group 13, auxiliary converter 17 and auxiliary transformer 18) mutually for each, and the embodiment of Fig. 1 only has a three-phase power injection circuit.
Specifically according to the operation of the static exciter of first embodiment, the operation of the static exciter of this embodiment is very clearly.
Fig. 3 and Fig. 4 illustrate the 3rd embodiment of static exciter 1 of the present invention.In these accompanying drawings, the element similar or equal with those elements of having described has identical reference number again.
Specifically, among Fig. 3, main transformer 8 is shown by connecting line 16 with field circuit transducer 9 and is connected.
Each connecting line 16 has first branch road 20 (Fig. 4) with first switch 21, and coupling circuit 15 comprises second branch road 22 in parallel with first branch road 20.
Control unit 11 (in this case, also be the single control unit 11 of the single control unit 11 of each connecting line 16 or the switch 21,23 of controlling each connecting line 16 separately) be connected to corresponding connecting line 16, and driving switch 21 and 23, promptly, it detects and connects 16 voltage, and correspondingly operates first and second switches 21,23.
One way component 24 is diodes, and it is arranged to make capacitor group 13 when discharge energy to be offered field circuit 3.
In addition, can provide the charging assemblies 25 such as for example battery in parallel with capacitor group 13.
Very clear in a word, (because the help of diode 24) do not have the voltage of fault and connecting line 16 to have under the situation of its nominal value at electrical network 5, the charging of capacitor group 13 is also via branch road 22 (promptly during operation, switch 21 disconnects, and switch 23 closures) carry out.
The operation of the static exciter 1 of the third embodiment of the present invention by described and shown in be conspicuous, and as described below in fact.
During normal running (that is, line voltage is at its nominal value), switch 21 closures (dotted line among Fig. 4), and switch 23 disconnects (dotted line among Fig. 4); Therefore, during normal running, branch road 20 is work, and branch road 22 is idle.
When fault generation and line voltage decline, the voltage of the low voltage side of main transformer 8 also descends, thereby the one or more voltage in these connecting lines 16 descends.
Only with reference to a connecting line (operating all identical) for each connecting line, the voltage voltage of (its indication electrical network 5) that detects connecting line 16 when control unit 11 drops to when being lower than scheduled voltage, it drives switch 21 for disconnecting, and is closed and switch 23 is driven.
Aspect this, Fig. 4 is shown in solid line in the switch 21 under the failure condition that line voltage descends and the configuration of switch 23; Therefore, under failure condition, branch road 20 is idle, and branch road 22 is work.
When switch 23 is closed, capacitor group 13 discharges, and diode 24 promotes course of discharges, makes electric power is injected field circuit transducer 9, and thereby inject field circuit 3; Switch 21 (disconnection) prevents that capacitor group 13 is by short circuit.
After fault, automatic safe and protection system are recovered line voltage in the short time.
When the voltage that detects connecting line 16 when control unit 11 was higher than scheduled voltage, it drove switch 21 for closed switch 23 is driven to disconnecting.
The disconnection of the closure of switch 21 and switch 23 also can be postponed to carry out with certain by control unit 11, makes to 13 chargings of capacitor group.
As a supplement or substitute, charging assembly 25 can be to 13 chargings of capacitor group.
Modified method
The invention still further relates to and be used for method that the static exciter of generator is retrofited.
This method is included between the AC side of the low voltage side of main transformer 8 and field circuit transducer 9 at least one capacitor group 13 is provided.
Advantageously, also provide coupling circuit 15, it is connected to capacitor group 13 connecting line 16 between the AC side of the low voltage side of main transformer 8 and field circuit transducer 9.
This modified method is particularly advantageous, because do not need to revise rotor, thereby does not need to open generator housing and any assembly is installed on rotor.
Be used to operate the method for static exciter
The invention still further relates to the method for the static exciter that is used for operate generator.
According to this method, when line voltage drops to when being lower than scheduled voltage, capacitor group 13 is injected electric power between the AC side of the low voltage side of main transformer 8 and field circuit transducer 9.
Described feature can provide certainly independently of each other.
In fact, employed material and size can choose at random with prior art as requested.
Reference number
1 static exciter
2 generators
3 field circuits
4: busbar
5 electrical networks
6 transformers
8] main transformer
9 field circuit transducers
11 control units
13 capacitor groups
15 coupling circuits
16 connecting lines
17 auxiliary converter
18 auxiliary transformers
19 auxiliary connecting lines
20 first branch roads
21 first switches
22 second branch roads
23 second switches
24 one way component
25 charging assemblies.
Claims (15)
1. the static exciter (1) of a generator (2), comprising: main transformer (8), its high-voltage side are connected to electrical network (5) and its low voltage side is connected to the field circuit transducer (9) to generator field circuit (3) feed,
Described static exciter (1) further comprises control unit (11), it is arranged to detect the state of described electrical network (5), make under the situation that is lower than scheduled voltage at least that capacitor group (13) offers described generator field circuit (3) with energy so that drop at the voltage of described electrical network (5), it is characterized in that
Described capacitor group (13) is connected between the AC side of the low voltage side of described main transformer (8) and described field circuit transducer (9).
2. static exciter as claimed in claim 1 (1), it is characterized in that, comprise coupling circuit (15) at least, it is connected to described capacitor group (13) connecting line (16) between the AC side of the low voltage side of described main transformer (8) and described field circuit transducer (9).
3. static exciter as claimed in claim 2 (1) is characterized in that, described coupling circuit (15) comprises auxiliary converter (17), and its DC side is connected to described capacitor group (13), and the AC side is coupled to described connecting line (16).
4. static exciter as claimed in claim 3 (1) is characterized in that, described auxiliary converter (17) is a bidirectional transducer.
5. static exciter as claimed in claim 3 (1) is characterized in that, the AC side inductance type of described auxiliary converter (17) is coupled to described connecting line (16).
6. static exciter as claimed in claim 5 (1) is characterized in that, the AC side of described auxiliary converter (17) realizes via at least one auxiliary transformer (18) with inductance coupling high described connecting line (16).
7. static exciter as claimed in claim 6 (1), it is characterized in that, described control unit (11) detects the voltage of the auxiliary at least connecting line (19) between described auxiliary converter (17) and the described auxiliary transformer (18), and correspondingly drives described auxiliary converter (17).
8. as claim 7 or 4 described static exciters (1), it is characterized in that described control unit (11) drives described auxiliary converter (17), make it make described capacitor group (13) discharge or make described capacitor group (13) charging.
9. static exciter as claimed in claim 3 (3), it is characterized in that, comprise a plurality of capacitor groups (13) that respectively are connected to auxiliary converter (17), wherein said auxiliary converter (17) respectively is connected to auxiliary transformer (18), and described auxiliary transformer (18) is coupled to the connecting line (16) between described main transformer (8) and the described field circuit transducer (9).
10. static exciter as claimed in claim 2, it is characterized in that, described connecting line (16) has first branch road (20) with first switch (21), and be characterised in that, described coupling circuit (15) comprises in parallel with described first branch road (20) and has second branch road (22) of the second switch at least (23) of connecting with one way component (24) at least, described capacitor group (13) is also connected to described second branch road (22), wherein, described control unit (11) detects the voltage of described connecting line (16), and correspondingly operate described first and second switches (21,23).
11. static exciter as claimed in claim 10 (1) is characterized in that, described one way component (24) is a diode, and it is arranged to make described capacitor group (13) when discharge energy to be offered described field circuit (3).
12. static exciter as claimed in claim 10 (1), it is characterized in that, also comprise the charging assembly (25) in parallel with described capacitor group (13), and/or wherein, described control unit (11) makes described first switch (21) closure and described second switch (23) is disconnected with certain delay, makes described capacitor group (13) is charged.
13. method that the static exciter (1) that is used for generator is retrofited, described static exciter (1) comprising: main transformer (8), its high-voltage side are connected to described electrical network (5) and its low voltage side is connected to the field circuit transducer (9) to generator field circuit (3) feed; Described static exciter (1) further comprises control unit (11), it is arranged to detect the state of described electrical network (5), make under the situation that is lower than scheduled voltage at least that capacitor group (13) offers described generator field circuit (3) with energy so that drop at the voltage of described electrical network, wherein, described method is included between the AC side of the low voltage side of described main transformer (8) and described field circuit transducer (9) at least one capacitor group (13) is provided.
14. method as claimed in claim 13, it is characterized in that, also provide to have the described static exciter (1) of coupling circuit (15) at least, described coupling circuit (15) is connected to described capacitor group (13) connecting line (16) between the AC side of the low voltage side of described main transformer (8) and described field circuit transducer (9).
15. method that is used for the static exciter (1) of operate generator, described static exciter (1) comprising: main transformer (8), its high-voltage side are connected to described electrical network (5) and its low voltage side is connected to the field circuit transducer (9) to generator field circuit (3) feed; Described static exciter (1) further comprises control unit (11), it is arranged to detect the state of described electrical network (5), make under the situation that is lower than scheduled voltage at least that capacitor group (13) offers described generator field circuit (3) with energy so that drop at the voltage of described electrical network (5), it is characterized in that described capacitor group (13) is injected electric power between the AC side of the low voltage side of described main transformer (8) and described field circuit transducer (9).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP09169645A EP2293432A1 (en) | 2009-09-07 | 2009-09-07 | Static exciter of an electric generator, method for retrofitting and method for operating the same |
| EP09169645.0 | 2009-09-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102013866A true CN102013866A (en) | 2011-04-13 |
Family
ID=41129135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010286458XA Pending CN102013866A (en) | 2009-09-07 | 2010-09-07 | Static exciter of an electric generator, method for retrofitting and method for operating the same |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US20110057631A1 (en) |
| EP (1) | EP2293432A1 (en) |
| CN (1) | CN102013866A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102386826A (en) * | 2011-10-28 | 2012-03-21 | 华中科技大学 | Self-shunt excitation system based on energy storage type dynamic voltage restorer |
| CN103023410A (en) * | 2012-12-21 | 2013-04-03 | 重庆磐达机械有限公司 | Double-excitation system for air-cooled generator set |
| CN104836404A (en) * | 2015-05-25 | 2015-08-12 | 湖南零陵恒远发电设备有限公司 | Dual-feed exciter and work method thereof |
| CN105099306A (en) * | 2014-05-12 | 2015-11-25 | 阿尔斯通技术有限公司 | Static exciter system for generators |
| CN105393449A (en) * | 2013-06-25 | 2016-03-09 | 西门子能源公司 | Using static excitation system to reduce the amplitude of torsional oscillations due to fluctuating industrial loads |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102412777B (en) * | 2011-12-02 | 2014-08-27 | 华中科技大学 | Self shunt excitation control system of series structure of three current-mode single-phase bridge-type convertors |
| US9334749B2 (en) * | 2013-10-18 | 2016-05-10 | Abb Technology Ag | Auxiliary power system for turbine-based energy generation system |
| US9614457B2 (en) | 2013-10-18 | 2017-04-04 | Abb Schweiz Ag | Modular thyristor-based rectifier circuits |
| US9577557B2 (en) | 2013-10-18 | 2017-02-21 | Abb Schweiz Ag | Turbine-generator system with DC output |
| EP2911292B1 (en) | 2014-10-09 | 2018-03-07 | General Electric Technology GmbH | A method and a generator system for operating a generator |
| US9337762B1 (en) * | 2014-12-15 | 2016-05-10 | Eaton Corporation | System and method for magnetizing a transformer in an electrical system prior to energizing the electrical system |
| RU168545U1 (en) * | 2016-07-20 | 2017-02-08 | Общество с ограниченной ответственностью Научно-производственное предприятие "ЭКРА" | STATIC SIMULATOR OF THE SYNCHRONOUS MOTOR |
| GB202117427D0 (en) * | 2021-12-02 | 2022-01-19 | Brush Elec Machines | An exciter circuit for a synchronous machine |
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| US3526823A (en) * | 1967-03-09 | 1970-09-01 | Gen Electric | Switching regulator control circuit |
| US3617857A (en) * | 1970-05-26 | 1971-11-02 | Motorola Inc | Voltage regulator for brushless alternator |
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| JPS5534854A (en) * | 1978-09-04 | 1980-03-11 | Hitachi Ltd | Controlling method of secondary winding-exciting motor |
| US4426613A (en) * | 1983-03-23 | 1984-01-17 | Hokuetsu Industries Co., Ltd. | Control system for a self-excited alternating current generator |
| SU1312715A1 (en) * | 1985-10-21 | 1987-05-23 | Днепродзержинский Индустриальный Институт Им.М.И.Арсеничева | Device for controlling excitation of synchronous machine |
| NO301917B1 (en) * | 1995-02-01 | 1997-12-22 | Fieldbus International As | Ac / DC converter |
| WO1999053606A1 (en) * | 1998-04-09 | 1999-10-21 | Mitsubishi Denki Kabushiki Kaisha | Exciter for generator |
| KR101175576B1 (en) | 2004-10-28 | 2012-08-21 | 알스톰 테크놀러지 리미티드 | Static energising system for a generator and method for operation of such an energising system |
| US8134345B2 (en) * | 2005-11-29 | 2012-03-13 | General Electric Company | Cryogenic exciter |
| US7786620B2 (en) * | 2008-02-15 | 2010-08-31 | Honeywell International Inc. | Battery supplementing super capacitor energy storage charge and discharge converter |
| EP2327142A1 (en) * | 2008-08-22 | 2011-06-01 | ABB Inc. | Stacked flyback converter with independent current loop control |
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2009
- 2009-09-07 EP EP09169645A patent/EP2293432A1/en not_active Withdrawn
-
2010
- 2010-08-23 US US12/861,253 patent/US20110057631A1/en not_active Abandoned
- 2010-09-07 CN CN201010286458XA patent/CN102013866A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102386826A (en) * | 2011-10-28 | 2012-03-21 | 华中科技大学 | Self-shunt excitation system based on energy storage type dynamic voltage restorer |
| CN103023410A (en) * | 2012-12-21 | 2013-04-03 | 重庆磐达机械有限公司 | Double-excitation system for air-cooled generator set |
| CN105393449A (en) * | 2013-06-25 | 2016-03-09 | 西门子能源公司 | Using static excitation system to reduce the amplitude of torsional oscillations due to fluctuating industrial loads |
| CN105099306A (en) * | 2014-05-12 | 2015-11-25 | 阿尔斯通技术有限公司 | Static exciter system for generators |
| CN105099306B (en) * | 2014-05-12 | 2019-06-21 | 通用电器技术有限公司 | Static exciter system for generator |
| CN104836404A (en) * | 2015-05-25 | 2015-08-12 | 湖南零陵恒远发电设备有限公司 | Dual-feed exciter and work method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| US20110057631A1 (en) | 2011-03-10 |
| EP2293432A1 (en) | 2011-03-09 |
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Application publication date: 20110413 |